These two programmers are infinitely linked. They are both capable of replacing each other. The RWB2007 And The Landis & Gyr RWB200 are very good programmers. Great reliability. But most home owners are trying to replace the Landis & Gyr RWB200 with the Siemens RWB2007, not so much the other way round.
Siemens RWB2007 Reviews / Availability
Siemens RWB2007 features: 5/2 or 7-day programmer, has a big blue display (that is always blue, so be aware of that), maximum of 3 on / off cycles per 24 hours, automatic Summer and Winter Time adjustment, Boost and Advance options, and has an Industry standard backplate.
The 2-channel RWB2007 timeswatch can control both the heating and hot water as follows: Constant, All day, Auto and Off. It's easy to fit, setup and operate, and has excellent reviews. The installation instructions / wiring diagram / manual for the RWB2007 can be found here. Install / Wiring Documentation | Instructions / Manual.
